Tensile modulus of polymer/CNT nanocomposites containing networked and dispersed nanoparticles

Abstract

The properties of three-dimensional networks of nanoparticles in polymer/carbon nanotubes (CNT) nanocomposites (PCNT) are particularly interesting from fundamental and application views. In this article, a new model is suggested for predicting the tensile modulus of PCNT using the Ouali and Paul models. The Ouali model considers the network of CNT in a polymer matrix, while the Paul model predicts the tensile modulus of samples containing dispersed nanoparticles. The predictions of the suggested approach are compared with experimental data from several samples. Also, the roles of the main parameters in the tensile modulus of PCNT are evaluated. The predictions agree with the experimental results at different filler concentrations. The roles of these parameters on the tensile modulus of PCNT are discussed based on the properties of CNT networks. V C 2017 American Institute of Chemical Engineers AIChE J, 64: 220-225, 2018 Figure 4. The effects of (a) "a" (ratio of filler length to filler diameter) and (b) "u per " (percolation threshold) on the predicted modulus at u f 5 0.02, f 5 0.5, E m 5 2 GPa, and E f 5 1000 GPa.

Electrical Conductivity and In Situ SAXS Probing of Block Copolymer Nanocomposites Under Mechanical Stretching

“…SEBS in the longitudinal direction has a narrow linear elastic region followed by a clear yield stress, related to the rupture of the PS cylindrical domains. , As expected, the addition of carbon nanotubes increased the elastic modulus and yield strength of SEBS due to the high stiffness of the nanomaterials and reduced the maximum elongation at break . This behavior is even more significant in samples containing SWCNTs, likely due to the material’s higher aspect ratio, which promotes earlier and more efficient contact between the nanotubes and enhances the reinforcing effect . The percolation of carbon nanotubes will be further discussed in a later section concerning the electrical conductivity effect.…”

“…30 This behavior is even more significant in samples containing SWCNTs, likely due to the material's higher aspect ratio, which promotes earlier and more efficient contact between the nanotubes and enhances the reinforcing effect. 38 The percolation of carbon nanotubes will be further discussed in a later section concerning the electrical conductivity effect. On the other hand, samples in the transverse direction have a lower slope in the initial elastic region, indicating a lower elastic modulus, and do not exhibit a peak yield stress.…”

Analysis of the Connecting Effectiveness of the Interphase Zone on the Tensile Properties of Carbon Nanotubes (CNT) Reinforced Nanocomposite

“…Additionally, most available models on the mechanics cannot suppose the interphase effects [18,32,33]. Therefore, several new and developed models were suggested to study the interphase character in the mechanical behavior [34][35][36].…”

Estimation of the tensile modulus of polymer carbon nanotube nanocomposites containing filler networks and interphase regions by development of the Kolarik model

“…A large amount of effort has been deployed to develop highperformance polymer nanocomposites for the benet of nanotechnology, including the combination of nano-reinforcements with polymer matrices. [1][2][3][4][5] Widespread research on polymer nanocomposites has been conducted to suggest novel materials for various applications. Carbon nanotubes (CNTs) have attracted much attention as innovative nanollers for polymer nanocomposites since their discovery in 1991.…”